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FAIR VALUE MEASUREMENTS (Narrative) (Details) - USD ($) $ in Millions |  | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 11, 2019 | Sep. 30, 2018 | Dec. 31, 2017 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 19, 2018
Fair Value Disclosures [Abstract] |  |  |  |  |  |
Fair value of debt |  |  |  | $ 4,400 | $ 4,000 |
Shiel Holdings LLC (Shiel) |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Contingent consideration value high |  |  | $ 15 |  |  |
Comparable company revenue volatility |  |  | 6.90% |  |  |
Discount rate |  |  | 4.50% |  |  |
Shiel Holdings LLC (Shiel) | Fair Value, Inputs, Level 3 |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Contingent consideration, liability |  |  | $ 6 |  | $ 7 |
ReproSource, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Contingent consideration value high |  |  |  |  |  | $ 10
Comparable company revenue volatility |  | 8.50% |  |  |  |
Discount rate |  | 6.50% |  |  |  |
ReproSource, Inc. | Fair Value, Inputs, Level 3 |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Contingent consideration, liability |  | $ 5 |  |  |  |
Boyce & Bynum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Contingent consideration value high | $ 25 |  |  |  |  |
Comparable company revenue volatility | 8.00% |  |  |  |  |
Discount rate | 7.20% |  |  |  |  |
Boyce & Bynum | Fair Value, Inputs, Level 3 |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Contingent consideration, liability | $ 6 |  |  |  |  |

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